Add new horse power hour energy unit (#828)

Co-authored-by: Andreas Gullberg Larsen <[email protected]>

Author: ssahon

Common/UnitDefinitions/Energy.json

@@ -188,6 +188,18 @@
           "AbbreviationsForPrefixes": { "Deca": "Английский декатерм" }
         }
       ]
+    },
+    {
+      "SingularName": "HorsepowerHour",
+      "PluralName": "HorsepowerHours",
+      "FromUnitToBaseFunc": "x*2.6845195377e6",
+      "FromBaseToUnitFunc": "x/2.6845195377e6",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "hp·h" ]
+        }
+      ]
     }
   ]
 }

UnitsNet.NumberExtensions.Tests/GeneratedCode/NumberToEnergyExtensionsTest.g.cs

@@ -78,6 +78,7 @@ public class EnergyTests : EnergyTestsBase
 
         protected override double TeraelectronVoltsInOneJoule => 6.2415093433e+6;
 
+        protected override double HorsepowerHoursInOneJoule => 3.725061361111e-7;
 
         [Fact]
         public void Constructor_UnitSystemSI_AssignsSIUnit()